S-25C080A データシートの表示（PDF） - Seiko Instruments Inc

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S-25C080A

CMOS SPI 8K SERIAL E2PROM

Seiko Instruments Inc 

Rev.1.1_00

CMOS SPI 8K SERIAL E2PROM

S-25C080A

6. Read memory data (Read)

The Read operation is shown below. Input the instruction code and the address from serial data input (SI) after

inputting “L” to the chip select ( CS ). The input address is loaded to the internal address counter, and data in the

address is output from the serial data output (SO).

Next, by inputting the serial clock (SCK) keeping the chip select ( CS ) in “L”, the address is automatically incremented

so that data in the following address is sequentially output. The address counter rolls over to the first address by

increment in the last address.

To finish the Read cycle, set CS to “H”. It is possible to raise the chip select always during the cycle. During Write, the

read instruction code is not be accepted or operated.

CS

WP

High / Low

SCK

SI

SO

1 2 3 4 5 6 7 8 9 10 11 21 22 23 24 25 26 27 28 29 30 31 32

Instruction

16-bit Address

High-Z

A15 A14 A13

A3 A2 A1 A0

Outputs the First Byte

Outputs

the Second

D7 D6 D5 D4 D3 D2 D1 D0 D7

Remark The higher addresses A15 to A10 = Don’t care.

Figure 16 Read operation

Seiko Instruments Inc.

17

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